Originally Posted by
Reely340
How accurate is that speed info of flightradar24 ?
Is that some calculated "post processed" mess by flightradar24 or is it the actual a/c speed at a historic point in time verbatim as transmitted by ADSB-out?
I wondered about the airspeed too. From the FAA website FAQ on ADS-B
ADS-B does not report vertical or horizontal airspeed. Instead, ADS-B reports horizontal and vertical velocity relative to the Earth. This velocity is useful for air traffic control functions and ADS-B applications. Airspeed can be provided by other aircraft sensors.
So that would ground speed, not an airspeed?